As for servicing markings I'd only add those that you see in photos, if any. I have never really wanted to add any to an airframe myself, but if I did it would be on a USAF F-4 and/ or an RCAF Sabre, both used for training and heavily stenciled.
The Vampire sounds nice, don't see too many of them on here !
Vampire Night Fighters! Of course, they come out at night and shun the daylight but with this type you wont need Garlic or Holy Water to keep them at bay!
On a different note, I recently bought a modelling magazine, Model Aircraft published by SAM Publications, the edition I bought was Vol 14 Iss 06 June 2015. I know its easy to criticize by my goodness what a mess in at least one article! Now I have not read all the magazine but I have found to inconsistencies and one very poorly written article

This will be the first time I have written a letter of complaint to this magazine as although the two articles I have read and have discrepancies they are not as bad as a third article that describes part of an aircraft and its actions as droops!

I am wondering if the modeller in question had his three year old son write that piece

Gondor